Typewriting machine



May 4 1926. h 1,583,514

G. AICHELE TYPBWRITING MACHINE Filed April e'] 1925 Patented May 4,1926.

GOTTLOIB 'AICHELE, or ELLJNGE NEA nssLiNenN, Gmmmassmma 'rf'o nAnuLER-Mo'rOREN-oEsELLscHAFT, MANY, A CORPORATION OF GERMANY.

or STUTTGiABT-UNTEBTURKHEIM', GER- TYPEWRITING MACHINE.

Application filed April 6, 1925. Serial NO. 21,091.

To all whom it may concern: 7

- Be it known that I, GoT'rLoB AIoHELn, a citizen of the German Republic, and residing at Nellingen, near Esslinge'n, in the State of VVurttemberg, Germany, have invented certain new and useful Improvements in Typewriting Machines, for which I have filed an application in Germany on January 30, 1924:, and of which the follow! ing is a specification.

This invention relates to typewrlting machines and more particularly to a typewriting machine having a removable paper' carrying carriage.

One object of the invention is to provide a locking lever engaging with a toothed wheel formed on the axle of the barrel so that the carriage spring located in the barrel is prevented from running down when the carriage is lifted. V

A further object ofthe invention is to provide a locking lever held automatically by the carriage bed plate out of engagement with the toothed wheel of the barrel and adapted when the carriage is lifted off to be brought into the locking position by means of a spring or the like.

The arrangement according to this invention is simpler and more complete than the arrangements normally used.

Means for locking the carriages of type,- writing machines, which come into action when the pressure plate carrying the carriage is removed together with the latter from the machine frame are not broadly new. In such arrangements it is however impossible to lock only'the barrel which actuates the carriage and to leave the carriage in a removable condition in Order to allow of inspection of its operating parts, or for cleaning purposes or the like. I arrangement as soon as the'fixing devices of the carriage are disconnected, the carriage travels under the influence of the.

spring until it encounters a guide. If the carriage is removed, the lock is no longer effective and the consequence is that the spring expands within the barrel. In the present invention on the other hand the locking device acts not on the carriage itself, which is removable with the pressure plate, but on its operating means only which is locked in the simplest possible manner.

Manually operated pawls are also known In such an for locking the barrel but these i arrangements as compared with my invention have the disadvantage that their adjustment is always dependent'o-n the operation of the person removing the carriage. A 7

One example of'constructlon of the invention is illustrated'in thejaccompanyingdrawings in which Figure 1 shows a portion of the carriage of a. typewriting machine and the under frame with barrel in part sectional elevation and section,thecarriage being lifted off the underframe. I

Figure 2 shows the same arrangement but with the difference that the carriage is seated on the under frame. 7 T he'carriage a as shown. in the drawings is formed with a rack bar 6 gearlng with a toothed wheel (Z mounted on the barrel 0. The carrlage is always 'drawn ini'one direc tion by the action of the spring as is well known. A pawl is pivotally mounted on the under frame and a pin. is loosely connected to the pawl and'moves in a guide 72- when the pawl pivots. A spring is is located between the head 2' of the pin and the guide 7b.. The spring which produces certain pressure, tends to move the'pawl in the direction indicated by thearrow and causes the pawl to engage the teeth of the wheel d when the carriage is lifted off. The engagement of the pawl f and'teeth d is therefore automatic and is dependent only on the position of the carriage and frame so that there is no danger of the spring running down.

When the carriage a is mounted in' position the pin gis depressedand the pawl is released from the pinion, the spring is be ing thereby compressed as shown in the drawings. v

The invention thus comprises a safety de- Vice for'locking the spring barrel in type-,

writing machines, which is automatically engaged and dlsengagedon the lifting off and replacement of the carriage, so that the spring is always prevented with certainty ed on said underframe a spring Within said barrel tending to rotate the same, a lever pivotally mounted on said underframe,

spring means tending to force said lever to engage with the teeth on said barreland an abutment connected with said leverand adapted to contact with said bed plate to GOTTLOB AICHELE. 

